PYREX Reusable Media Storage Bottles have graduations in mL. They have orange autoclavable polypropylene plug seal caps. Also,they have drip-free pouring rings of clear polypropylene. Can withstand temperatures up to 140°C (284°F) [included on sizes 50mL through 10L]. Two types of glass available: a) clear glass for routine storage applications and b) low actinic red glass for storing light-sensitive materials. There are nine sizes: 25mL, 50mL, 100mL, 250mL, 500mL, 1L, 2L, 5L and 10L. The 100mL through 2L sizes can be used with Corning Bottle Top Vacuum Filters. Bottles which are larger than 2L are recommended not to be used with filter units.